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The dual 120 mm Pulse Width Modulation (PWM) fans are fused with directional blades that channel air through the radiator for optimal cooling Two 120 mm voltage controlled (PWM) fans ensure quiet, efficient cooling while the 240 mm radiator maximizes cooling surface area to dissipate heat from the highest performance CPUs on the market.

In addition to an extra long radiator, two extra large pumps work in unison to rapidly circulate coolant through the KUHLER H2O 1250.

The unit is even covered by Antec's renowned AQ3 three year warranty for parts and labor.

Lastly, the included Antec Grid software helps you monitor and control the Antec KUHLER H2O 1250's performance and allows you to customize its stylish RGB LED.

Designed to unlock the maximum potential of your CPU, the Antec KUHLER H2O 1250 delivers exceptional cooling when you need it the most.

Quick Info

WarrantyBeyond any applicable Newegg return policy, this item is warranted independently by the product's Manufacturer or a Third party. Below is a summary provided for convenience only and may not be accurate or current.
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Rating: 5/5Great Visuals

Pros: I've owned several of these. They draw more heat away from the CPU than anything else I've used including the Corsair H100i which I had to get rid of. The best part of this is the ability to see instantly the processor temperature using the LED.

Cons: The first one I had caused issues with the flexible mount, but they've fixed that with the new design. Also the fans are not swappable.

Rating: 2/5Works but there are issues.

Pros: Cools really well, easy to install and quiet when it wants to be.

Cons: Noisy fans are an issue with this product. I've had to replace the original one I bought after a couple of weeks of the fans staying noisy. The new one I got from Antec through RMA was nice a quiet for about a week, then the fans started making noise again. I have yet to replace the second one.

Rating: 2/5Pumps are loud!

Pros: Cools really well. LED light on cold plate is slick- colors change based on temp.Install wasn't as bad as some people say.

Cons: Pumps are super loud. Sounded like an electric razor.Returning it based on this fact.

Other Thoughts: I bought this from a different retailer, but since I am returning it to them and will be purchasing another brand from Newegg I figured I should let people who might buy this know how my experience was.

I installed this the only way my case would allow, on the top, in the 240mm spot of my case. It went in pretty easily and I was super excited to get cooling. But when I fired it up the first thing I heard was that electric razor sound. A little bit of research later and I discovered that if I turn my case on its side and let some air bubbles work their way out I should be fine. I tried this and it worked....for about 3 hours. The sound came back with a vengeance. Since then I have tried everything to install this in and outside of my case with the exception of the rear position, which I can't do because of my graphics card.

My only options are to return it and find something else or use my computer sideways.

Cons: Software stopped working after 90 days. Downloaded updated software and it still would not work. Connected to CPU/Power fan on board and worked without the ANTEC software.

6 months cleaning fans/pumps found one not working (both connected to CPU header with Y adapter). Hooked 1 to CPU fan and 1 to Sys fan and both work be I have to set them with the MB software. I just ordered a different 240 cooler. May check ANTEC Customer Service out when it arrives.

Rating: 5/5Very Simple Installation

Pros: I have to first start off saying those that complain of fumbling with backplates and mounting brackets must be doing it all wrong. This was one of the simplest CPU coolers to mount I've had (besides finding a place for the radiator). The CPU block itself was VERY simple, took zero force, and is extremely solid. I have no idea where these people come up with their problems.

Cons: The only big negative I stumbled on was DO NOT try to remove the protetive film from the CPU block. It is not protective film but will remove the entire Antec logo with it. To me it looked like I should remove it so I did. Oh well not a huge deal. I also don't like how the Grid control software prompts to run on startup every time, even when clicking "do not prompt again". Very annoying so I simply removed it from startup through MSCONFIG. Nothing worth deducting an egg on.

Other Thoughts: And I have to reiterate, this thing is VERY easy to install. Even though I do like the cooler, it doesn't seem to cool as good as I hoped, but perhaps that is just my CPU. Running an i7 3770K overclocked from 3.5 to 4.6GHz. Temps idle at 30C but get close or slightly above 90C on PRIME95, which seems pretty high. This is at 1.4V, which is probably higher than I need it, but since everything is rock stable I'm ok with that. I was just hoping for much better temps on full load; like 70C. Perhaps that is unrealistic though.

Rating: 1/5Bad quality control, pumps bad on multiple units

Pros: Dual pump design gives your system the security of having a failsafe in case one pump dies, the other can still cool your system.

Cons: Horrible reliability. Pumps on 2 different units began making clicking, grinding noises within an hour of installation, the second one was grinding immediately after installation. After trying 2 different Antec coolers, I exchanged for a Corsair H110.

Other Thoughts: I had high hopes for this cooler, and it provided great cooling during the first benchmark I did before it started to make noise. Building the pump into the fan makes this a very unique design and I liked the look of it, but it makes it impossible to replace fans if they fail.

Rating: 5/51250 Antec H2O

Pros: Fabulous cooling, does exactly what it says it will do and then some. Its a big radiator and I know some people have complained about installation, this is usually due to inexperience and poor case selection. Everyone who bought this cooler knew how big it was prior to purchase, but your case preference will be one of the biggest issues not the cooler, re: Thermaltake (easy as 1,2,3) overseer vs nzxt (this was a tough install as there is no real mounting area for a 240 mil rad)

Cons: need to match the case to the rad size, seem to have a higher than average issue with loud pumps. I have to return one due to carzy loud pump (1 of 2 purchased)

Other Thoughts: other than the one loud pump I have been running antec liquid coolers for 3 years now and I really cant say anything bad about them they do what they are supposed to do period.

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